Difference between revisions of "2008 EA9"

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(Adjusted table, corrected typo.)
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{| cellpadding="2" cellspacing="0" style="margin:25px 0 0 10px; border:3px solid lightsteelblue;width:250px; font-size:90%; font-family:'Arial','Helvetica'; float: right; clear: right;"Template in Orbiter"
 
{| cellpadding="2" cellspacing="0" style="margin:25px 0 0 10px; border:3px solid lightsteelblue;width:250px; font-size:90%; font-family:'Arial','Helvetica'; float: right; clear: right;"Template in Orbiter"
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!bgcolor="lightsteelblue" colspan="2" align="center" |Mercury
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!bgcolor="lightsteelblue" colspan="2" align="center" |2008 EA9
 
|-
 
|-
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|colspan="2" align="center"|[[Image:MercuryScrshot.jpg|240px]]
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|colspan="2" align="center"|[[Image:2008 EA9.png|240px]]
 
|-
 
|-
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|colspan="2" align="center"|'''Mercury in Orbiter'''
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|colspan="2" align="center"|'''2008 EA9 in Orbiter'''
 
|-
 
|-
 
!bgcolor="lightsteelblue" colspan="2"|Designation
 
!bgcolor="lightsteelblue" colspan="2"|Designation
 
|-
 
|-
−
|Name||align="right"|Mercury
+
|Name||align="right"|2008 EA9
 
|-
 
|-
−
|Reference body||align="right"|Sun
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|width="30%"|Reference body||align="right" width="30%"|Sun
 
|-
 
|-
−
|Number of satellites||align="right" width="30%"|0
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|width="30%"|Number of satellites||align="right" width="30%"|0
 
|-
 
|-
 
!bgcolor="lightsteelblue" colspan="2"|Planetary mean orbits
 
!bgcolor="lightsteelblue" colspan="2"|Planetary mean orbits
 
|-
 
|-
−
|Epoch||align="right"|J2000 (1 January 2000)
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|width="30%"|Epoch||align="right" width="50%"|2456200.5
 
|-
 
|-
−
|Semimajor axis (a)||align="right" |0.38709893 AU <br> 5.790917567×10<sup>7</sup> km)
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|width="30%"|Semimajor axis (a)||align="right" width="50%"|158445707km<br>(1.0591441317518 AU)
 
|-
 
|-
−
|Eccentricity (e)||align="right"|0.20563069
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|width="30%"|Eccentricity (e)||align="right" width="30%"| 0.07979741866638632
 
|-
 
|-
−
|Inclination (i)||align="right"|7.00487° <br> (0.122258 radian)
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|width="30%"|Inclination (i)||align="right" width="30%"|0.00740892102487189 radian<br>(0.4244999054709°)
 
|-
 
|-
−
|Longitude of the ascending node (LAN, ☊)||align="right"|48.33167° <br> (0.8436468 radian)
+
|width="30%"|Longitude of the ascending node (LAN, ☊)||align="right" width="30%"|2.25946066154116 radian<br>129.457559882145°
 
|-
 
|-
−
|Longitude of periapsis (ϖ)||align="right"|77.45645° <br> (1.351870 radian)
+
|width="30%"|Longitude of periapsis (ϖ)||align="right" width="30%"|5.86213737085752 radian<br>335.875730276052°
 
|-
 
|-
−
|Mean longitude (L)||align="right"|252.25084° <br> (4.402608 radian)
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|width="30%"|Perihelion distance||align="right" width="30%"|145,802,148 km<br>(0.974627164042352 AU)
 
|-
 
|-
−
!bgcolor="lightsteelblue" colspan="2"|Planetary orbital element centennial rates
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|width="30%"|Mean anomaly||align="right" width="30%"|2.13421261863746 radian<br>(122.28137563149°)
 
|-
 
|-
−
|Semimajor axis (a)||align="right"|0.00000066 AU/Century
+
|width="30%"|Time of perihelion passage||align="right" width="30%"|2456065.265083140718 JED<br>(2012 May 17.76508314)
 
|-
 
|-
−
|Eccentricity (e)||align="right"|0.00002527 Century<sup>-1</sup>
+
|width="30%"|Orbital period||align="right" width="30%"|398.1356099236119 d<br>(1.09 yr)
 
|-
 
|-
−
|Inclination (i)||align="right"|-23.51 seconds/Century
+
|width="30%"|Mean motion||align="right" width="30%"|0.9042145214518018 °/d
 
|-
 
|-
−
|Longitude of the ascending node (LAN, ☊)||align="right"|-446.30 seconds/Century
+
|width="30%"|Aphelion distance||align="right" width="30%"|171,089,265 km<br>(1.143661099461241 AU)
 
|-
 
|-
−
|Longitude of periapsis (ϖ)||align="right"|573.57 seconds/Century
+
!bgcolor="lightsteelblue" colspan="2"|Rotational Elements
 
|-
 
|-
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|Mean longitude (L)||align="right"|538101628.29 seconds/Century
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|||2008 EA9 does not rotate,<br>the body maintains the same sidereal orientation over time.
 
|-
 
|-
 
!bgcolor="lightsteelblue" colspan="2"|Selected physical parameters
 
!bgcolor="lightsteelblue" colspan="2"|Selected physical parameters
 
|-
 
|-
−
|width="30%"|Mean radius||align="right"|2440 km
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|width="30%"|Mean radius||align="right" width="30%"| 10 m
 
|-
 
|-
−
|Mass||align="right"|3.301880×10<sup>23</sup> kg
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|width="30%"|Mass||align="right" width="30%"|1200000 kg
 
|-
 
|-
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|Density||align="right"|5.427 g/cm<sup>3</sup>
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|width="30%"|Note||align="right" width="30%"|*Elements given are from 2008 EA9.pdf.
−
|-
+
|}
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|Sidereal rotation period||align="right"|1407.509 hours
+
 
−
|-
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{{Addon
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|Sidereal orbit period||align="right"|0.2408445 years
+
|1=[https://www.orbiter-forum.com/resources/asteroid-2008-ea9-dockable.2644/ Asteroid 2008 EA9 (dockable)]
−
|-
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|2=[[List of add-ons by joffrey|joffrey]]
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|Magnitude V(1,0)||align="right"|-0.42
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|3=2012-11-13
−
|-
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|4=Orbiter 2010, Orbiter 2016
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|Geometric albedo||align="right"|0.106
+
}}
−
|-
+
 
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|Equatorial gravity||align="right"|3.701 m/s<sup>2</sup>
+
'''2008 EA9''' is a very small near-Earth object about 17 meters in diameter, first detected  by NASAs Center for Near-Earth Object Studies (CNEOS), and is in an Earth-crossing orbit.
−
|-
+
 
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|Escape velocity||align="right"|4.435 km/s
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The [[Orbiter]] version was created by joffrey in 2012. It was modeled as a vessel rather than as a body.
 +
 
 +
It is a strange critter. It has size (10 meters diameter), it is visible, it has mass (1.2 million kg), which gives it a density of 764 kg/m, but it has no gravity. It does not rotate keeping the same orientation to the celestial sphere over time, therefore it has no poles nor equator. It cannot be selected as a reference body, but it can be selected as a target.
 +
 
 +
As a vessel, it can be targeted as stated before, has 6 invisible docks each with a COMNAV frequency assigned, but you cannot switch ships into it. In order for it to be the focus vessel, it must be stated as the focus vessel in the scenario file before launching the scenario. If you then switch from 2008 EA9 into another vessel, you cannot switch back, it does not appear in the switch ship list. Once you dock with it, you cannot change its orientation with engines or thrusters.
 +
 
 +
But, it is an interesting entity to rendezvous and dock with. The dock and land lights work at 2008 EA9.
 +
 
 +
{|class="wikitable"
 +
|'''Port'''||'''COM/NAV<br>Frequency (MHz)'''
 
|-
 
|-
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|SOI radius (estimated)||align="right"|28385 km
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|Transponder||133.00
 
|-
 
|-
−
!bgcolor="lightsteelblue" colspan="2"|Rotation elements
+
|1||133.05
 
|-
 
|-
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|North pole right ascension (α<sub>1</sup>)||align="right"|280.99°
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|2||133.10
 
|-
 
|-
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|North pole declination (δ<sub>1</sup>)||align="right"|61.44°
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|3||133.15
 
|-
 
|-
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|Obliquty of ecliptic||align="right"|7.01°
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|4||133.20
 
|-
 
|-
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|Longitude of Sun's transit||align="right"|228.31°
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|5||133.25
 
|-
 
|-
−
|Note||align="right" width="30%"|*Elements given are from Orbiter.pdf (2016)
+
|6||133.30
 
|}
 
|}
 +
 +
==Gallery==
 +
[[File:2008 EA9 orbit.png|240 px]]
 +
<br>Orbit of 2008 EA9 compared to those of the inner planets.
 +
 +
{{SolarSystem}}
 +
 +
[[Category:Articles]]
 +
[[Category:Add-ons]]
 +
[[Category:Celestial body add-ons]]
 +
[[Category:Near-Earth objects]]
 +
[[Category:Solar System]]

Latest revision as of 13:17, 18 May 2024

2008 EA9
2008 EA9.png
2008 EA9 in Orbiter
Designation
Name 2008 EA9
Reference body Sun
Number of satellites 0
Planetary mean orbits
Epoch 2456200.5
Semimajor axis (a) 158445707km
(1.0591441317518 AU)
Eccentricity (e) 0.07979741866638632
Inclination (i) 0.00740892102487189 radian
(0.4244999054709°)
Longitude of the ascending node (LAN, ☊) 2.25946066154116 radian
129.457559882145°
Longitude of periapsis (ϖ) 5.86213737085752 radian
335.875730276052°
Perihelion distance 145,802,148 km
(0.974627164042352 AU)
Mean anomaly 2.13421261863746 radian
(122.28137563149°)
Time of perihelion passage 2456065.265083140718 JED
(2012 May 17.76508314)
Orbital period 398.1356099236119 d
(1.09 yr)
Mean motion 0.9042145214518018 °/d
Aphelion distance 171,089,265 km
(1.143661099461241 AU)
Rotational Elements
2008 EA9 does not rotate,
the body maintains the same sidereal orientation over time.
Selected physical parameters
Mean radius 10 m
Mass 1200000 kg
Note *Elements given are from 2008 EA9.pdf.

Project home: Asteroid 2008 EA9 (dockable)
Author: joffrey
Current version: 2012-11-13
Compatibility: Orbiter 2010, Orbiter 2016


2008 EA9 is a very small near-Earth object about 17 meters in diameter, first detected by NASAs Center for Near-Earth Object Studies (CNEOS), and is in an Earth-crossing orbit.

The Orbiter version was created by joffrey in 2012. It was modeled as a vessel rather than as a body.

It is a strange critter. It has size (10 meters diameter), it is visible, it has mass (1.2 million kg), which gives it a density of 764 kg/m, but it has no gravity. It does not rotate keeping the same orientation to the celestial sphere over time, therefore it has no poles nor equator. It cannot be selected as a reference body, but it can be selected as a target.

As a vessel, it can be targeted as stated before, has 6 invisible docks each with a COMNAV frequency assigned, but you cannot switch ships into it. In order for it to be the focus vessel, it must be stated as the focus vessel in the scenario file before launching the scenario. If you then switch from 2008 EA9 into another vessel, you cannot switch back, it does not appear in the switch ship list. Once you dock with it, you cannot change its orientation with engines or thrusters.

But, it is an interesting entity to rendezvous and dock with. The dock and land lights work at 2008 EA9.

Port COM/NAV
Frequency (MHz)
Transponder 133.00
1 133.05
2 133.10
3 133.15
4 133.20
5 133.25
6 133.30

Gallery[edit]

2008 EA9 orbit.png
Orbit of 2008 EA9 compared to those of the inner planets.

edit The Solar System
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Sun (Sol)

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Add-ons

Planets - Dwarf Planets - Small objects - Natural satellites - Alternative star systems

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